I suppose the question might be whether the creator of the script intended to end the sequence with Samba Side Chasses, or some similar side-closes: but surely, Side Samba Chasses IS a standard figure, and Laird gives no alternate timing. My copy is 6th Ed. (2003), and the figure is charted on p78.
I've been asking around, this week, at a couple of social dances in my area, and I find that this particular sequence is the only samba regularly danced at typical 50:50 dances - so I might stick with it for now, but I'll take a look at the alternative you mention. Thanks.